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学科主题: Chemistry, Physical
题名: Synthesis of high-quality MCM-48 mesoporous silica using gemini surfactant dimethylene-1,2-bis(dodecyldimethylammonium bromide)
作者: Han, SH ; Xu, J ; Hou, WG ; Yu, XM ; Wang, YS
通讯作者: shuhhan@sdu.edu.cn
刊名: JOURNAL OF PHYSICAL CHEMISTRY B
发表日期: 2004
卷: 108, 期:39, 页:15043-15048
收录类别: sci
部门归属: Shandong Univ, Minist Educ, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China; Weifang Sch, Dept Chem, Weifang 261063, Peoples R China; Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Peoples R China
项目归属: 广东省应用海洋生物学重点实验室
摘要: Using the Gemini surfactant [C12H25N+(CH3)(2-)N+(CH3)(2)-N+(CH3)(2)-C12H25](.)2Br(-) (abbreviated as C12-2-12) with the short spacer group (s = 2) as structure-directing agent and sodium silicate as precursor, high-quality ordered cubic mesoporous silica (space group Ia3d) was prepared through the S+I- route (S denotes surfactant, I precursor). The samples were characterized by small-angle X-ray diffraction, transmission electron microscopy, and N-2 adsorption-desorption techniques. Results showed that the pore structure of the resulting mesoporous silica belonged to the cubic structure (space group Ia3d). The high-quality cubic mesoporous structure was formed at 1:0.33 (molar ratio of sodium silicate to C12-2-12), 2:1 (ethyl acetate to sodium silicate), and at 30 degreesC. The formation conditions of MCM-48 with C12-2-12 were milder than those with the corresponding monovalent surfactants, such as alkyltrimethylammonium bromide. N-2 adsorption-desorption curves revealed type IV isotherms and H1 hysteresis loops; Brunauer-Emmet-Teller (BET) surface areas increased with the decrease of the molar ratio of sodium silicate to C12-2-12 and of ethyl acetate to sodium silicate as well as of the hydrothermal temperatures.
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WOS记录号: WOS:000224070200039
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/5450
Appears in Collections:广东省应用海洋生物学重点实验室_期刊论文

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Han, SH; Xu, J; Hou, WG; Yu, XM; Wang, YS.Synthesis of high-quality MCM-48 mesoporous silica using gemini surfactant dimethylene-1,2-bis(dodecyldimethylammonium bromide),JOURNAL OF PHYSICAL CHEMISTRY B,2004,108(39):15043-15048
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